createIndex(MetaDataContext context,
String prefix,
Index tmplate,
Column[] cols,
boolean adapt)
Retrieve/create an index on the given columns by merging the given
template information with any user-provided information.

createUnique(MetaDataContext context,
String prefix,
Unique tmplate,
Column[] cols,
boolean adapt)
Retrieve/create a unique constraint on the given columns by merging the
given template information with any user-provided information.